<template>
   <header class="head-nav">
        <el-row>
            <el-col :span="6" class='logo-container'>
                <img src="../assets/logo.png" class="logo" alt="">
                <span class="title">在线后台管理系统</span>
            </el-col>
            <el-col :span="6" class="user">
                <div class="userinfo">
                    <img src="https://www.gravatar.com/avatar/anything?s=200&d=mm" class="avatar" alt="">
                    <div class="welcome">
                        <p class="name comename">欢迎</p>
                        <p class="name avatarname">{{user.name}}</p>
                    </div>
                    <span class="username">
                        <!--下拉箭头-->
                        <el-dropdown trigger="click" @command="setDialogInfo">
                              <span class="el-dropdown-link">
                                  <i class="el-icon-caret-bottom el-icon--right"></i>
                              </span>
                              <el-dropdown-menu slot="dropdown">
                                  <el-dropdown-item command="info">个人信息</el-dropdown-item>
                                  <el-dropdown-item command="logout">退出</el-dropdown-item>
                              </el-dropdown-menu>
                        </el-dropdown>
                    </span>
                </div>
            </el-col>
        </el-row>
   </header>
</template>

<script>
    export default {
        name: "header-nav",
        computed:{
            user(){
                return this.$store.getters.user;
            }
        },
        methods:{
            // 接受参数为表单中的cammand
            setDialogInfo(cmdItem){
                switch ((cmdItem)) {
                    case 'info':
                        this.showInfoList();
                        break;
                    case 'logout':
                        this.logout();
                        break;
                }
            },
            showInfoList(){
                this.$router.push('infoshow');
            },
            logout(){
                // 清除token
                localStorage.removeItem('eleToken');
                // 设置vuex store
                this.$store.dispatch('clearCurrentState');
                // 跳转
                this.$router.push('/login');
            }
        }
    }
</script>

<style scoped>
    .head-nav {
        width: 100%;
        height: 60px;
        min-width: 600px;
        padding: 5px;
        background: #324057;
        color: #fff;
        border-bottom: 1px solid #1f2d3d;
        position: fixed;
        z-index: 99;
    }
    .logo-container {
        line-height: 60px;
        min-width: 400px;
    }
    .logo {
        height: 50px;
        width: 50px;
        margin-right: 5px;
        margin-left: 2px;
        vertical-align: middle;
        display: inline-block;
    }
    .title {
        vertical-align: middle;
        font-size: 22px;
        font-family: "Microsoft YaHei";
        letter-spacing: 3px;
    }
    .user {
        line-height: 60px;
        text-align: right;
        float: right;
        padding-right: 10px;
    }
    .avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        vertical-align: middle;
        display: inline-block;
    }
    .welcome {
        display: inline-block;
        width: auto;
        vertical-align: middle;
        padding: 0 5px;
    }
    .name {
        line-height: 20px;
        text-align: center;
        font-size: 14px;
    }
    .comename {
        font-size: 12px;
    }
    .avatarname {
        color: #409eff;
        font-weight: bolder;
    }
    .username {
        cursor: pointer;
        margin-right: 5px;
    }
    .el-dropdown {
        color: #fff;
    }
</style>